Author:
Chattopadhyay Agnishom,Mazowiecki Filip,Muscholl Anca,Riveros Cristian
Abstract
We present pumping lemmas for five classes of functions definable by
fragments of weighted automata over the min-plus semiring, the max-plus
semiring and the semiring of natural numbers. As a corollary we show that the
hierarchy of functions definable by unambiguous, finitely-ambiguous,
polynomially-ambiguous weighted automata, and the full class of weighted
automata is strict for the min-plus and max-plus semirings.
Publisher
Centre pour la Communication Scientifique Directe (CCSD)
Subject
General Computer Science,Theoretical Computer Science
Cited by
3 articles.
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